<template>
  <view class="content">

    <u-empty v-if="empty==0" mode="list" icon="http://cdn.uviewui.com/uview/empty/list.png">
    </u-empty>

    <view class="u-wrap" v-else>
      <!-- <view class="u-search-box">
        <view class="u-search-inner">
          <u-icon name="search" color="#909399" :size="28"></u-icon>
          <text class="u-search-text">请输入关键词</text>
        </view>
      </view> -->
      <view class="u-menu-wrap">
        <scroll-view scroll-y scroll-with-animation class="u-tab-view menu-scroll-view" :scroll-top="scrollTop">
          <view @click="selectBrank(item.id)" v-for="(item, index) in tabbar" :key="index" class="u-tab-item"
            :class="[current == index ? 'u-tab-item-active' : '']" :data-current="index" @tap.stop="swichMenu(index)">
            <text class="u-line-1">{{ item.name }}</text>
          </view>
        </scroll-view>
        <block v-for="(item, index) in tabbar" :key="index"  >
          <scroll-view scroll-y class="right-box" v-if="current == index">
            <view class="page-view">
              <view class="class-item">
                <view class="item-title">
                  <text>{{ item.name }}</text>
                </view>
                <view class="item-container">
                  <view class="thumb-box" v-for="(item1, index1) in item.children_text" :key="index1" @click="toproindex(item1.id)">
                    <image class="item-menu-image" :src="item1.thumb_text" mode=""></image>
                    <view class="item-menu-name">{{ item1.name }}</view>
                  </view>
                </view>
              </view>
            </view>
          </scroll-view>
        </block>
      </view>
    </view>

  </view>
</template>

<script>
// import classifyData from "@/common/classify.data.js";
export default {
  onLoad(options) {
    this.ptypeid = options.ptypeid ? options.ptypeid : 0


    this.getprotypelist()
  },
  data() {
    return {
      tabbar: [],
      scrollTop: 0, //tab标题的滚动条位置
      current: 0, // 预设当前项的值
      menuHeight: 0, // 左边菜单的高度
      menuItemHeight: 0, // 左边菜单item的高度
      ptypeid: 0,
      branklist: [],
      btypeid:"",
      ptypeid:"",
      brand_id:"",
      empty:0
    }
  },
  computed: {

  },
  methods: {
    async getprotypelist() {
      let data = {
        ptypeid: this.ptypeid
      }

      let result = await this.$u.api.product.protypedata(data)
      if (result.code) {
        if(result.data.length>0)
        {
          this.empty = 1
          this.tabbar = result.data
          this.ptypeid = result.data[0].id

        }else
        {
          this.empty = 0
        }
      }else
      {
        this.empty = 0

      }
    },
    selectBrank(e) {
        this.ptypeid = e
    },

    getImg() {
      return Math.floor(Math.random() * 35);
    },
    // 点击左边的栏目切换
    async swichMenu(index) {
      if (index == this.current) return;
      this.current = index;
      // 如果为0，意味着尚未初始化
      if (this.menuHeight == 0 || this.menuItemHeight == 0) {
        await this.getElRect('menu-scroll-view', 'menuHeight');
        await this.getElRect('u-tab-item', 'menuItemHeight');
      }
      // 将菜单菜单活动item垂直居中
      this.scrollTop = index * this.menuItemHeight + this.menuItemHeight / 2 - this.menuHeight / 2;
    },
    // 获取一个目标元素的高度
    getElRect(elClass, dataVal) {
      new Promise((resolve, reject) => {
        const query = uni.createSelectorQuery().in(this);
        query.select('.' + elClass).fields({ size: true }, res => {
          // 如果节点尚未生成，res值为null，循环调用执行
          if (!res) {
            setTimeout(() => {
              this.getElRect(elClass);
            }, 10);
            return;
          }
          this[dataVal] = res.height;
        }).exec();
      })
    },
    toproindex(e)
    {

   
   
      uni.$u.route({
        url:"pagesA/product/index",
        params:{
          ptypeid:this.ptypeid,
          brand_id:e,
          ptypeid:this.ptypeid
        }
      })
    }
  }
}
</script>

<style lang="scss" scoped>
.u-wrap {
  height: calc(100vh);
  /* #ifdef H5 */
  height: calc(100vh - var(--window-top));
  /* #endif */
  display: flex;
  flex-direction: column;
}

.u-search-box {
  padding: 18rpx 30rpx;
}

.u-menu-wrap {
  flex: 1;
  display: flex;
  overflow: hidden;
}

.u-search-inner {
  background-color: rgb(234, 234, 234);
  border-radius: 100rpx;
  display: flex;
  align-items: center;
  padding: 10rpx 16rpx;
}

.u-search-text {
  font-size: 16px;

  color: $u-tips-color;
  margin-left: 10rpx;
}

.u-tab-view {
  width: 200rpx;
  height: 100%;
}

.u-tab-item {
  height: 110rpx;
  background: #f6f6f6;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26rpx;
  color: #444;
  font-weight: 400;
  line-height: 1;
}

.u-tab-item-active {
  position: relative;
  color: #000;
  font-size: 30rpx;
  font-weight: 600;
  background: #fff;
}

.u-tab-item-active::before {
  content: "";
  position: absolute;
  height: 32rpx;
  left: 0;
  top: 39rpx;
}

.u-tab-view {
  height: 100%;
}

.right-box {
  background-color: rgb(250, 250, 250);
}

.page-view {
  padding: 16rpx;
}

.class-item {
  margin-bottom: 30rpx;
  background-color: #fff;
  padding: 16rpx;
  border-radius: 8rpx;
}

.item-title {
  font-size: 26rpx;
  color: $u-main-color;
  font-weight: bold;
}

.item-menu-name {
  font-weight: normal;
  width: 70px;

  font-size: 24rpx;

  color: $u-main-color;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;

}

.item-container {
  display: flex;
  flex-wrap: wrap;
}

.thumb-box {
  width: 33.333333%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  flex-direction: column;
  margin-top: 20rpx;
}

.item-menu-image {
  width: 120rpx;
  height: 120rpx;
}
</style>
